Efficacy of Transgenic Maize LD05 Against Fall Armyworm (Spodoptera frugiperda)

文献类型： 外文期刊

第一作者： Li, Wenlan

作者： Li, Wenlan;Hou, Xinwei;Ding, Zhaohua;Meng, Zhaodong;Yue, Runqing;Gao, Xiang

作者机构：

关键词： agronomic traits; efficacy; expression; fall armyworm; transgenic maize LD05

期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）

ISSN： 2223-7747

年卷期： 2025 年 14 卷 16 期

页码：

收录情况： SCI

摘要： The fall armyworm (Spodoptera frugiperda (J.E. Smith)), which invaded China in 2018, has caused severe corn yield losses and increased pesticide application frequency. Bacillus thuringiensis (Bt)-based genetically modified corn represents an environmentally friendly and effective strategy for managing S. frugiperda. The transgenic corn LD05 harbors the m2cryAb-vip3A insect-resistant fusion gene, which has demonstrated potent inhibitory effects against fall armyworm and is currently in the phase of applying for safety certification. Here, we evaluated the inhibitory efficacy of LD05 against S. frugiperda through laboratory and field experiments during 2022-2024. The LC50 and LC95 of M2CryAb-VIP3A against fall armyworm were 0.024 mu g/cm(2) and 0.508 mu g/cm(2), respectively; and the GLC(50) and GLC(95) were 0.142 mu g cm(-2) and 0.556 mu g cm(-2), respectively. M2CryAb-VIP3A expression of LD05 varied significantly across tissues, and remained stable between generations. Bioassays revealed significant tissue-specific differences in fall armyworm larval mortality for LD05 corn tissues, ranked as V5-stage leaves > R3-stage kernels > R1-stage silks. Field trials demonstrated that LD05 corn significantly reduced fall armyworm larval populations, leaf damage incidence, and plant damage incidence compared to non-Bt control Zheng58. Agronomic trait analysis showed no significant differences between LD05 and Zheng58. These results indicate that LD05 has a significant inhibitory effect on fall armyworm, which is an effective strategy for the comprehensive management of fall armyworm in China.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序